A data center water supply antifreeze system and control method

Abstract

This invention provides a data center water supply antifreeze system and control method, belonging to the field of data center technology. The system includes a water supply pipeline module and a control module. The water supply pipeline module includes a main water supply pipe, a loop water supply pipe, a loop return water pipe, and several parallel water supply branches. Each water supply branch includes a water supply branch pipe and a return water branch pipe, with the second end of the water supply branch pipe connected to a water supply pipeline. A water flow detection and control module is installed on the main water supply pipe, and a water circulation control module is installed on the loop water supply pipe. The water circulation control module is connected in parallel with a water supply and drainage module. Each water supply branch is equipped with an electric heating module. This invention enables freezing risk prediction, achieves automated control of the antifreeze system, avoids problems such as frozen pipe leakage, pipe melting, and power consumption due to dry burning in winter, and reduces data center operation and maintenance costs.

Description

Technical Field

[0001] This invention belongs to the field of data center technology, specifically relating to a data center water supply antifreeze system and control method. Background Technology

[0002] With the continuous development of 5G, cloud computing, and big data, data centers, as data hubs and application carriers, are the fundamental infrastructure supporting digital computing power and information systems across various industries, and a crucial prerequisite for informatization. As market demand for data centers grows, their overall scale continues to rise. With the increase in data center business volume, IT equipment continues to evolve towards higher computing power and higher power density, with CPU and server power continuously increasing. This poses greater challenges to other auxiliary equipment in data centers, especially cooling equipment, requiring efforts to ensure the safe, stable, and reliable operation of data centers and enhance their resilience to extreme weather conditions.

[0003] During winter, data centers often experience pipe freezing due to low temperatures, leading to pipe bursts and other problems. Such malfunctions require data center shutdowns for maintenance, disrupting continuous business operations. Furthermore, water leaks from burst pipes can cause electrical faults and even safety incidents. Currently, the common solution for freezing water supply pipes in data centers during winter is heating with heating cables. However, in practice, excessive heating power often causes pipes to melt, while insufficient heating power leads to freezing. Moreover, water supply and heating cables are independent processes, resulting in frequent instances of dry burning or wasted electricity, indicating a lack of reasonable automated anti-freezing control measures.

[0004] This is a shortcoming of the existing technology. Therefore, it is very necessary to provide a data center water supply antifreeze system and control method to address the above-mentioned defects in the existing technology. Summary of the Invention

[0005] As the performance requirements of data centers in the existing technologies become increasingly demanding, the requirements for cooling equipment also become increasingly stringent. However, in winter, the cooling equipment is prone to pipe bursts due to freezing due to low temperatures, as well as water leakage and splashing. Existing heating methods using heat tracing cables have shortcomings, as the heat tracing cables and the water supply pipes of the cooling equipment are independent of each other and lack automated anti-freeze control. This invention provides a data center water supply anti-freeze system and control method to solve the above-mentioned technical problems.

[0006] In a first aspect, the present invention provides a data center water supply antifreeze system, including a water supply pipeline module and a control module;

[0007] The water supply pipeline module includes a main water supply pipe, a loop water supply pipe, a loop return water pipe, and several parallel water supply branches;

[0008] The loop water supply pipe is connected in series with the parallel water supply branch pipe and the loop return water pipe to form a loop;

[0009] The loop water supply pipe and the loop return pipe are connected to the main water supply pipe at the connection point;

[0010] Each water supply branch includes a water supply branch pipe and a return branch pipe. The first end of the water supply branch pipe is connected to the loop water supply pipe, the second end of the water supply branch pipe is connected to the first end of the return branch pipe, and the second end of the return branch pipe is connected to the loop return pipe.

[0011] The second end of the water supply branch pipe is also connected to a water supply pipe;

[0012] The main water supply pipe is equipped with a water flow detection and control module, the loop water supply pipe is equipped with a water circulation control module, the water circulation control module is connected in parallel with a water supply and drainage module, and each water supply branch is equipped with an electric heating module.

[0013] The control module is connected to the water flow detection control module, water circulation control module, water supply and drainage module, and electric heating module. The control module is also connected to a temperature sensor and a water circulation auxiliary control module.

[0014] Furthermore, a water control valve is installed on the water pipeline;

[0015] Connect the water control valve to the control module;

[0016] The water flow detection module includes a water flow sensor and a first solenoid valve;

[0017] A water flow sensor and a first solenoid valve are connected in series on the main water supply pipe, and both are connected to the control module. The water flow sensor detects whether the main water supply pipe is in use and provides this information to the control module for automatic control. The first solenoid valve is installed on the main water supply pipe to control the start and stop of the water supply at the upstream end.

[0018] Furthermore, the water circulation control module includes a circulating water pump and a check valve;

[0019] The circulating water pump and the check valve are connected in series on the loop water supply pipe;

[0020] The water supply and drainage module includes a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, and a sixth solenoid valve.

[0021] The third solenoid valve is connected to the inlet of the circulating water pump. The other end of the third solenoid valve is connected to the second and fourth solenoid valves. The other end of the second solenoid valve is connected to the first drain pipe. The other end of the fourth solenoid valve is connected to the fifth and sixth solenoid valves. The other end of the fifth solenoid valve is connected to the second drain pipe. The other end of the sixth solenoid valve is connected to the outlet of the check valve. The outlet of the circulating water pump is connected to the check valve to prevent backflow of circulating water. The second, third, fourth, fifth, and sixth solenoid valves of the water supply and drainage module are installed on the parallel bypass of the circulating water pump to enable direct water supply to the system in non-freezing conditions. They can also be used for sewage discharge of the pipeline system or for draining and freezing protection in non-working scenarios.

[0022] Furthermore, the electric heating module includes a heating cable with a built-in temperature probe;

[0023] The heat tracing cable is wrapped around the outside of the water supply branch pipe, and the temperature probe of the heat tracing cable is set below the water supply branch pipe, close to the water supply branch pipe.

[0024] Both the heat tracing cable and the temperature probe are connected to the control module;

[0025] The temperature sensor is bundled along the loop water supply pipe, with its temperature probe exposed to the air. The electric heating module uses a heating cable with a built-in temperature probe. The temperature sensor detects the outdoor ambient temperature to provide information for the control module's automatic control. The heating cable begins at the junction of the loop water supply pipe and the water supply branch pipe and wraps around the pipe to the junction of the water supply branch pipe and the return branch pipe, providing a heat source for the water supply branch pipe to prevent freezing. The heating cable has a built-in temperature probe, which is positioned close to the bottom of the pipe for detecting the water temperature in the water supply branch pipe.

[0026] Furthermore, the water circulation auxiliary module includes a seventh solenoid valve and several branch control valves;

[0027] The seventh solenoid valve is installed on the loop return water pipe, and the control valves for each branch are installed on the return water branch pipes of the corresponding water supply branch.

[0028] Secondly, the present invention provides a control method for a data center water supply antifreeze system based on the first aspect described above, comprising the following steps:

[0029] S1. The control module determines the system's operating mode;

[0030] When the working mode is non-antifreeze mode, proceed to step S2;

[0031] When the working mode is antifreeze and heat preservation mode, proceed to step S3;

[0032] When the working mode is antifreeze venting mode, proceed to step S4;

[0033] S2. The control module shuts down the water circulation control module, opens the solenoid valve for water supply in the water supply and drainage module, opens the water supply pipeline, shuts down the water circulation auxiliary control module and disconnects the electric heating module, and returns to step S1.

[0034] S3. The control module turns on the water circulation control module, turns off the water supply and drainage module, turns on the water supply pipeline, turns on the water circulation auxiliary control module, and determines whether the pipeline water temperature reaches the ambient temperature threshold after the water circulation control module is turned on. If the ambient temperature threshold is not reached, the electric heating module is turned on. If the ambient temperature threshold is reached, the electric heating module is not turned on. Then return to step S1.

[0035] S4. The control module closes the first solenoid valve, closes the water circulation control module, opens the water supply and drainage module, opens the water supply pipeline, opens the water circulation auxiliary control module, and disconnects the electric heating module. After draining, it closes the control of the water supply and drainage module, the water supply pipeline, and the water circulation auxiliary control module, and enters the water supply standby mode.

[0036] Furthermore, the specific steps of step S1 are as follows:

[0037] S11. Pre-set the ambient temperature threshold;

[0038] S12. The control module acquires the pipeline water flow rate collected by the water flow sensor and the ambient temperature collected by the temperature sensor;

[0039] S13. The control module determines whether the water flow rate in the pipeline is greater than 0;

[0040] If so, proceed to step S14;

[0041] If not, proceed to step S15;

[0042] S14. The control module determines whether the ambient temperature is greater than or equal to the ambient temperature threshold.

[0043] If so, determine that the system is in non-antifreeze mode and proceed to step S2;

[0044] If not, determine that the system is in anti-freeze and heat preservation mode, and proceed to step S3;

[0045] S15. The control module determines whether the pipeline water flow rate of 0 continues for a set time period.

[0046] If so, determine that the system is in antifreeze and venting mode, and proceed to step S4;

[0047] If not, return to step S14.

[0048] Furthermore, the specific steps of step S2 are as follows:

[0049] S21. The control module controls the opening of the first solenoid valve, the third solenoid valve, the fourth solenoid valve, the sixth solenoid valve, and each water control valve;

[0050] S22. The control module controls the second solenoid valve, the fifth solenoid valve, the seventh solenoid valve, and the control valves of each branch to close;

[0051] S23. The control module controls the circulating water pump and check valve to close;

[0052] S24. The control module controls the heat tracing cable to shut down.

[0053] Furthermore, the specific steps of step S3 are as follows:

[0054] S31. The control module controls the opening of the first solenoid valve, the seventh solenoid valve, each branch control valve, and each water control valve.

[0055] S32. The control module controls the second, third, fourth, fifth, and sixth solenoid valves to close.

[0056] S33. The control module starts the circulating water pump and the check valve;

[0057] S34. The control module acquires the pipeline water temperature collected by the temperature probe of the heat tracing cable;

[0058] S35. The control module determines whether the pipeline water temperature is still lower than the ambient temperature threshold after the circulating water pump is turned on.

[0059] If so, proceed to step S36;

[0060] If not, control the heating tape not to turn on and return to step S13;

[0061] S36. The control module turns on the heating tape, monitors the water temperature in the pipeline, and issues a temperature alarm when the water temperature in the pipeline exceeds the alarm limit, then returns to step S13.

[0062] Furthermore, the specific steps of step S33 are as follows:

[0063] S331. The control module opens the check valve;

[0064] S332. The control module determines the type of circulating water pump;

[0065] When the circulating water pump is a variable frequency pump, proceed to step S333;

[0066] When the circulating water pump is a fixed frequency pump, start the circulating water pump directly and proceed to step S34;

[0067] S333. The control module controls the circulating water pump to start running from the lowest frequency and performs PID control with the set temperature as the target value.

[0068] S334. The control module determines whether the frequency of the circulating water pump has reached its maximum value;

[0069] If so, proceed to step S34;

[0070] If not, return to step S333.

[0071] Furthermore, the specific steps of step S36 are as follows:

[0072] S361. The control module activates the heat tracing cable and determines the type of heat tracing cable;

[0073] When the tracing tape is a variable power electric heating tape, proceed to step S362;

[0074] When the tracing tape is a constant power electric tracing tape, proceed to step S363;

[0075] S362. The control module monitors the water temperature in the pipeline and performs PID control on the heat tracing cable with the set pipeline temperature as the target value, and then proceeds to step S364.

[0076] S363. The control module determines whether the water temperature in the pipeline is higher than the upper temperature limit;

[0077] If so, turn off the heat tracing cable;

[0078] If not, keep the heat tracing cable on.

[0079] S364. The control module determines whether the pipeline water temperature exceeds the alarm limit;

[0080] If so, report the abnormal alarm and return to step S13;

[0081] If not, keep the heating cable in operation.

[0082] Furthermore, the specific steps of step S4 are as follows:

[0083] S41. The control module controls the first solenoid valve to close;

[0084] S42. The control module controls the second, third, fourth, fifth, sixth, and seventh solenoid valves, as well as all water control valves and branch control valves to open.

[0085] S43. The control module controls the circulating water pump to shut down;

[0086] S44. The control module controls the heat tracing cable to shut down;

[0087] S45. The control module determines whether the drainage time has reached the drainage time threshold.

[0088] If so, proceed to step S46;

[0089] If not, return to step S45;

[0090] S46. The control module controls the second, third, fourth, fifth, sixth, and seventh solenoid valves, as well as all water control valves and branch control valves to close.

[0091] S47. The control module controls the system to enter the water supply standby mode, wait for the manual exit command, and return to step S13 after receiving the manual exit command.

[0092] The beneficial effects of this invention are as follows:

[0093] The data center water supply antifreeze system and control method provided by this invention can predict freezing risks, optimize system design to ensure system reliability, minimize system energy consumption, and combine with the judgment of working mode to realize the automated control of the antifreeze system, so as to avoid problems such as frozen pipe leakage, pipe melting, and empty burning of electricity in the water supply system in winter, and reduce the operation and maintenance costs of data centers.

[0094] Furthermore, the design principle of this invention is reliable, the structure is simple, and it has a very wide range of application prospects.

[0095] Therefore, it is evident that the present invention has outstanding substantive features and significant progress compared with the prior art, and the beneficial effects of its implementation are also obvious. Attached Figure Description

[0096] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0097] Figure 1 This is a schematic diagram of the data center water supply antifreeze system of the present invention.

[0098] Figure 2 This is a schematic flowchart of Embodiment 3 of the control method for the data center water supply antifreeze system of the present invention.

[0099] Figure 3 This is a schematic flowchart of Embodiment 4 of the control method for the data center water supply antifreeze system of the present invention.

[0100] In the diagram, 1-water flow sensor; 2-circulating water pump; 3-check valve; 4-temperature sensor; 5-heating cable; 6-loop water supply pipe; 7-water supply branch pipe; 8-return water branch pipe; 9-loop return water pipe; 10-main water supply pipe; V1-; V2-second solenoid valve; V3-third solenoid valve; V4-fourth solenoid valve; V5-fifth solenoid valve; V6-sixth solenoid valve; V7-seventh solenoid valve; V8-eighth solenoid valve; V9-ninth solenoid valve; V10-tenth solenoid valve; V11-eleventh solenoid valve; V12-twelfth solenoid valve; V13-thirteenth solenoid valve. Detailed Implementation

[0101] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0102] Example 1:

[0103] like Figure 1 As shown, the present invention provides a data center water supply antifreeze system, including a water supply pipeline module and a control module;

[0104] The water supply pipeline module includes a main water supply pipe 10, a loop water supply pipe 6, a loop return water pipe 9, and several parallel water supply branches;

[0105] The loop water supply pipe 6 is connected in series with the parallel water supply branch and the loop return water pipe 9 to form a loop;

[0106] The loop water supply pipe 6 and the loop return water pipe 9 are connected to the main water supply pipe 10 at the connection point;

[0107] Each water supply branch includes a water supply branch pipe 7 and a return water branch pipe 8. The first end of the water supply branch pipe 7 is connected to the loop water supply pipe 6, the second end of the water supply branch pipe 8 is connected to the first end of the return water branch pipe 8, and the second end of the return water branch pipe 8 is connected to the loop return water pipe 9.

[0108] The second end of water supply branch pipe 8 is also connected to a water supply pipe;

[0109] A water flow detection and control module is installed on the main water supply pipe 1, a water circulation control module is installed on the loop water supply pipe 6, a water supply and drainage module is connected in parallel to the water circulation control module, and an electric heating module is installed on each water supply branch.

[0110] The control module is connected to the water flow detection control module, the water circulation control module, the water supply and drainage module, and the electric heating module. The control module is also connected to temperature sensor 4 and the water circulation auxiliary control module.

[0111] Example 2:

[0112] like Figure 1 As shown, the present invention provides a data center water supply antifreeze system, including a water supply pipeline module and a control module;

[0113] The water supply pipeline module includes a main water supply pipe 10, a loop water supply pipe 6, a loop return water pipe 9, and three parallel water supply branches;

[0114] The loop water supply pipe 6 is connected in series with the three parallel water supply branches and the loop return water pipe 9 to form a loop;

[0115] The loop water supply pipe 6 and the loop return water pipe 9 are connected to the main water supply pipe 10 at the connection point;

[0116] Each water supply branch includes a water supply branch pipe 7 and a return water branch pipe 8. The first end of the water supply branch pipe 7 is connected to the loop water supply pipe 6, the second end of the water supply branch pipe 8 is connected to the first end of the return water branch pipe 8, and the second end of the return water branch pipe 8 is connected to the loop return water pipe 9.

[0117] A water flow detection and control module is installed on the main water supply pipe 1, a water circulation control module is installed on the loop water supply pipe 6, a water supply and drainage module is connected in parallel to the water circulation control module, and an electric heating module is installed on each water supply branch.

[0118] The control module is connected to the water flow detection control module, the water circulation control module, the water supply and drainage module, and the electric heating module. The control module is also connected to the temperature sensor 4 and the water circulation auxiliary control module.

[0119] The water flow detection module includes a water flow sensor 1 and a first solenoid valve V1;

[0120] The water flow sensor 1 and the first solenoid valve V1 are connected in series on the water supply main pipe 1, and both the water flow sensor 1 and the first solenoid valve V1 are connected to the control module.

[0121] The water flow sensor 1 is used to detect whether the main water supply line is in use and provides the information to the control module for automatic control; the first solenoid valve V1 is installed on the main water supply line 10 to control the start and stop of the water supply at the front end.

[0122] The circulation control module includes a circulating water pump 2 and a one-way valve 3;

[0123] The circulating water pump 2 and the check valve 3 are connected in series on the loop water supply pipe 6;

[0124] The water supply and drainage module includes a second solenoid valve V2, a third solenoid valve V3, a fourth solenoid valve V4, a fifth solenoid valve V5, and a sixth solenoid valve V6.

[0125] The third solenoid valve V3 is connected to the inlet of the circulating water pump 2. The other end of the third solenoid valve V3 is connected to the second solenoid valve V2 and the fourth solenoid valve V4. The other end of the second solenoid valve V2 is connected to the first drain pipe. The other end of the fourth solenoid valve V4 is connected to the fifth solenoid valve V5 and the sixth solenoid valve V6. The other end of the fifth solenoid valve V5 is connected to the second drain pipe. The other end of the sixth solenoid valve V6 is connected to the outlet of the check valve 3. The outlet of the circulating water pump 2 is connected to the check valve 3 to prevent backflow of circulating water. The second solenoid valve V2, the third solenoid valve V3, the fourth solenoid valve V4, the fifth solenoid valve V5, and the sixth solenoid valve V6 of the water supply and drainage module are installed on the parallel bypass of the circulating water pump 2 to realize direct water supply to the system in non-freezing conditions. They can also be used for sewage discharge of the pipeline system or for emptying and freezing protection in non-working scenarios.

[0126] Each electric heating module includes a heating cable 5 with a built-in temperature probe;

[0127] The heat tracing cable 5 is wrapped around the outside of the corresponding water supply branch pipe 7, and the temperature probe of the heat tracing cable 5 is set below the corresponding water supply branch pipe 7, close to the water supply branch pipe 7.

[0128] Both the heat tracing cable 5 and the temperature probe are connected to the control module;

[0129] Temperature sensor 4 is tied along the loop water supply pipe 6, and the temperature probe of temperature sensor 4 is placed in the air; the electric heating module uses a heating cable 5 with a built-in temperature probe; temperature sensor 4 is used to detect the outdoor ambient temperature to provide information to the control module for automatic control; the heating cable 5 starts from the junction of the loop water supply pipe 6 and the water supply branch pipe 7 and winds along the pipe to the junction of the water supply branch pipe 7 and the return water branch pipe 8, providing a heat source for the water supply branch pipe 7 for pipe freeze protection; the heating cable 5 has a built-in temperature probe, which is placed close to the bottom of the pipe for water temperature detection in the water supply branch pipe 7.

[0130] The water circulation auxiliary module includes a seventh solenoid valve V7 and three branch control valves;

[0131] The seventh solenoid valve V7 is installed on the loop return water pipe 9, and the branch control valves are installed on the return water branch pipes 8 of the corresponding water supply branch. The three branch control valves are the eighth solenoid valve V8 located on the first return water branch pipe 8, the tenth solenoid valve 10 located on the second return water branch pipe 8, and the twelfth solenoid valve V12 located on the third return water branch pipe 8.

[0132] Each of the three water supply branch pipes 7 has its own water supply pipeline connected to its second end; each of the three water supply pipelines is equipped with a water control valve; the three water control valves are the ninth solenoid valve V9 connected to the second end of the first water supply branch pipe, the eleventh solenoid valve V11 connected to the second end of the second water supply branch pipe, and the thirteenth solenoid valve V13 connected to the second end of the third water supply branch pipe.

[0133] The ninth solenoid valve V9, the eleventh solenoid valve V11, and the thirteenth solenoid valve V13 are all connected to the control module.

[0134] Example 3:

[0135] like Figure 2 As shown, the present invention provides a control method for a data center water supply antifreeze system based on the above embodiment 2, comprising the following steps:

[0136] S1. The control module determines the system's operating mode;

[0137] When the working mode is non-antifreeze mode, proceed to step S2;

[0138] When the working mode is antifreeze and heat preservation mode, proceed to step S3;

[0139] When the working mode is antifreeze venting mode, proceed to step S4;

[0140] S2. The control module shuts down the water circulation control module, opens the solenoid valve for water supply in the water supply and drainage module, opens the water supply pipeline, shuts down the water circulation auxiliary control module and disconnects the electric heating module, and returns to step S1.

[0141] S3. The control module turns on the water circulation control module, turns off the water supply and drainage module, turns on the water supply pipeline, turns on the water circulation auxiliary control module, and determines whether the pipeline water temperature reaches the ambient temperature threshold after the water circulation control module is turned on. If the ambient temperature threshold is not reached, the electric heating module is turned on. If the ambient temperature threshold is reached, the electric heating module is not turned on. Then return to step S1.

[0142] S4. The control module closes the first solenoid valve, closes the water circulation control module, opens the water supply and drainage module, opens the water supply pipeline, opens the water circulation auxiliary control module, and disconnects the electric heating module. After draining, it closes the control of the water supply and drainage module, the water supply pipeline, and the water circulation auxiliary control module, and enters the water supply standby mode.

[0143] Example 4:

[0144] like Figure 3 As shown, the present invention provides a control method for a data center water supply antifreeze system based on the above embodiment 2, comprising the following steps:

[0145] S1. The control module determines the system's operating mode;

[0146] When the working mode is non-antifreeze mode, proceed to step S2;

[0147] When the working mode is antifreeze and heat preservation mode, proceed to step S3;

[0148] When the working mode is antifreeze venting mode, proceed to step S4;

[0149] The specific steps of step S1 are as follows:

[0150] S11. Pre-set the ambient temperature threshold;

[0151] S12. The control module acquires the pipeline water flow rate collected by the water flow sensor and the ambient temperature collected by the temperature sensor;

[0152] S13. The control module determines whether the water flow rate in the pipeline is greater than 0;

[0153] If so, proceed to step S14;

[0154] If not, proceed to step S15;

[0155] S14. The control module determines whether the ambient temperature is greater than or equal to the ambient temperature threshold.

[0156] If so, determine that the system is in non-antifreeze mode and proceed to step S2;

[0157] If not, determine that the system is in anti-freeze and heat preservation mode, and proceed to step S3;

[0158] S15. The control module determines whether the pipeline water flow rate of 0 continues for a set time period.

[0159] If so, determine that the system is in antifreeze and venting mode, and proceed to step S4;

[0160] If not, return to step S14;

[0161] S2. The control module shuts down the water circulation control module, opens the solenoid valve for water supply in the water supply and drainage module, opens the water supply pipeline, shuts down the water circulation auxiliary control module and disconnects the electric heating module, and returns to step S1; the specific steps of step S2 are as follows:

[0162] S21. The control module controls the opening of the first solenoid valve, the third solenoid valve, the fourth solenoid valve, the sixth solenoid valve, and each water control valve;

[0163] S22. The control module controls the second solenoid valve, the fifth solenoid valve, the seventh solenoid valve, and the control valves of each branch to close;

[0164] S23. The control module controls the circulating water pump and check valve to close;

[0165] S24. The control module controls the heat tracing cable to shut down;

[0166] S3. The control module activates the water circulation control module, deactivates the water supply and drainage module, activates the water supply pipeline, activates the water circulation auxiliary control module, and determines whether the pipeline water temperature reaches the ambient temperature threshold after activating the water circulation control module. If the ambient temperature threshold is not reached, the electric heating module is activated; otherwise, the electric heating module is not activated, and the process returns to step S2. The specific steps of step S3 are as follows:

[0167] S31. The control module controls the opening of the first solenoid valve, the seventh solenoid valve, each branch control valve, and each water control valve.

[0168] S32. The control module controls the second, third, fourth, fifth, and sixth solenoid valves to close.

[0169] S33. The control module starts the circulating water pump and the check valve;

[0170] S34. The control module acquires the pipeline water temperature collected by the temperature probe of the heat tracing cable;

[0171] S35. The control module determines whether the pipeline water temperature is still lower than the ambient temperature threshold after the circulating water pump is turned on.

[0172] If so, proceed to step S36;

[0173] If not, control the heating tape not to turn on and return to step S13;

[0174] S36. The control module turns on the heating tape, monitors the water temperature in the pipeline, and issues a temperature alarm when the water temperature in the pipeline exceeds the alarm limit, then returns to step S13.

[0175] S4. The control module closes the first solenoid valve, closes the water circulation control module, opens the water supply and drainage module, opens the water pipe, opens the water circulation auxiliary control module, and disconnects the electric heating module. After draining, it closes the control modules for the water supply and drainage, water pipe, and water circulation auxiliary control module, and enters the water supply standby mode. The specific steps of step S4 are as follows:

[0176] S41. The control module controls the first solenoid valve to close;

[0177] S42. The control module controls the second, third, fourth, fifth, sixth, and seventh solenoid valves, as well as all water control valves and branch control valves to open.

[0178] S43. The control module controls the circulating water pump to shut down;

[0179] S44. The control module controls the heat tracing cable to shut down;

[0180] S45. The control module determines whether the drainage time has reached the drainage time threshold.

[0181] If so, proceed to step S46;

[0182] If not, return to step S45;

[0183] S46. The control module controls the second, third, fourth, fifth, sixth, and seventh solenoid valves, as well as all water control valves and branch control valves to close.

[0184] S47. The control module controls the system to enter the water supply standby mode, wait for the manual exit command, and return to step S13 after receiving the manual exit command.

[0185] In the above embodiment 4, step S33 is specifically as follows:

[0186] S331. The control module opens the check valve;

[0187] S332. The control module determines the type of circulating water pump;

[0188] When the circulating water pump is a variable frequency pump, proceed to step S333;

[0189] When the circulating water pump is a fixed frequency pump, start the circulating water pump directly and proceed to step S34;

[0190] S333. The control module controls the circulating water pump to start running from the lowest frequency and performs PID control with the set temperature as the target value.

[0191] S334. The control module determines whether the frequency of the circulating water pump has reached its maximum value;

[0192] If so, proceed to step S34;

[0193] If not, return to step S333;

[0194] The specific steps of step S36 are as follows:

[0195] S361. The control module activates the heat tracing cable and determines the type of heat tracing cable;

[0196] When the tracing tape is a variable power electric heating tape, proceed to step S362;

[0197] When the tracing tape is a constant power electric tracing tape, proceed to step S363;

[0198] S362. The control module monitors the water temperature in the pipeline and performs PID control on the heat tracing cable with the set pipeline temperature as the target value, and then proceeds to step S364.

[0199] S363. The control module determines whether the water temperature in the pipeline is higher than the upper temperature limit;

[0200] If so, turn off the heat tracing cable;

[0201] If not, keep the heat tracing cable on.

[0202] S364. The control module determines whether the pipeline water temperature exceeds the alarm limit;

[0203] If so, report the abnormal alarm and return to step S13;

[0204] If not, keep the heating cable in operation.

[0205] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the invention should also be covered within the protection scope of the invention. Therefore, the protection scope of the invention should be determined by the scope of the claims.

Claims

1. A control method for a data center water supply freeze protection system, comprising: The data center water supply anti-freezing system comprises a water supply pipeline module and a control module; The water supply pipeline module comprises a water supply main pipe (10), a loop water supply pipe (6), a loop return pipe (9) and a plurality of parallel water supply branches; The loop water supply pipe (6) is connected in series with the parallel water supply branches and the loop return pipe (9) to form a loop; The loop water supply pipe (6) and the loop return pipe (9) are connected to the water supply main pipe (10) at the connection; Each water supply branch comprises a water supply branch pipe (7) and a return branch pipe (8), the first end of the water supply branch pipe (7) is connected to the loop water supply pipe (6), the second end of the water supply branch pipe (7) is connected to the first end of the return branch pipe (8), and the second end of the return branch pipe (8) is connected to the loop return pipe (9); The second end of the water supply branch pipe (7) is further connected to a water use pipeline; The water supply main pipe (10) is provided with a water flow detection control module, the loop water supply pipe (6) is provided with a water circulation control module, the water circulation control module is connected in parallel with a water supply and drainage module, and each water supply branch is provided with an electric heating module; The control module is connected with the water flow detection control module, the water circulation control module, the water supply and drainage module and the electric heating module, and is further connected with a temperature sensor (4) and a water circulation auxiliary control module; The water use pipeline is provided with a water use control valve; The water use control valve is connected with the control module; The water flow detection module comprises a water flow sensor (1) and a first electromagnetic valve (V1); The water flow sensor (1) and the first electromagnetic valve (V1) are connected in series on the water supply main pipe (10), and both are connected with the control module; The water circulation control module comprises a circulating water pump (2) and a one-way valve (3); The circulating water pump (2) and the one-way valve (3) are connected in series on the loop water supply pipe (6); The water supply and drainage module comprises a second electromagnetic valve (V2), a third electromagnetic valve (V3), a fourth electromagnetic valve (V4), a fifth electromagnetic valve (V5) and a sixth electromagnetic valve (V6); The third electromagnetic valve (V3) is connected to the water inlet of the circulating water pump (2), the other end of the third electromagnetic valve (V3) is connected to the second electromagnetic valve (V2) and the fourth electromagnetic valve (V4), the other end of the second electromagnetic valve (V2) is connected with a first drainage pipe, the other end of the fourth electromagnetic valve (V4) is connected to the fifth electromagnetic valve (V5) and the sixth electromagnetic valve (V6), the other end of the fifth electromagnetic valve (V5) is connected with a second drainage pipe, and the other end of the sixth electromagnetic valve (V6) is connected to the water outlet of the one-way valve (3); The electric heating module comprises a heat tracing tape (5) with a temperature probe; The heat tracing tape (5) is wound outside the water supply branch pipe (7), and the temperature probe of the heat tracing tape (5) is arranged below the water supply branch pipe (7) and closely attached to the water supply branch pipe (7); Both the heat tracing tape (5) and the temperature probe are connected with the control module; The temperature sensor (4) is tied along the loop water supply pipe (6), and the temperature probe of the temperature sensor (4) is placed in the air; The water circulation auxiliary module comprises a seventh electromagnetic valve (V7) and a plurality of branch control valves; The seventh electromagnetic valve (V7) is arranged on the loop return pipe (9), and each branch control valve is arranged on the return branch pipe (8) of the corresponding water supply branch; The control method comprises the following steps: S1. The control module determines the system working mode; When the working mode is the non-anti-freezing mode, step S2 is entered; When the working mode is the anti-freezing and heat preservation mode, step S3 is entered; When the working mode is the anti-freezing and emptying mode, step S4 is entered; S2. The control module closes the water circulation control module, opens the electromagnetic valve for water supply in the water supply and drainage module, opens the water using pipeline, closes the water circulation auxiliary control module, and disconnects the electric heating module, and returns to step S1; S3. The control module opens the water circulation control module, closes the water supply and drainage module, opens the water using pipeline, opens the water circulation auxiliary control module, and determines whether the pipeline water temperature reaches the environmental temperature threshold after the water circulation control module is opened, and when the environmental temperature threshold is not reached, the electric heating module is opened, and when the environmental temperature threshold is reached, the electric heating module is not opened, and returns to step S1; S4. The control module closes the first electromagnetic valve, closes the water circulation control module, opens the water supply and drainage module, opens the water using pipeline, opens the water circulation auxiliary control module, and disconnects the electric heating module, and after draining, the control water supply and drainage module, the water using pipeline, and the water circulation auxiliary control module are closed, and the water supply standby mode is entered.

2. The data center water supply freeze protection system control method of claim 1, wherein, The specific steps of step S1 are as follows: S11. The environmental temperature threshold is set in advance; S12. The control module acquires the pipeline water flow collected by the water flow sensor and acquires the environmental temperature collected by the temperature sensor; S13. The control module determines whether the pipeline water flow is greater than 0; If yes, step S14 is entered; If no, step S15 is entered; S14. The control module determines whether the environmental temperature is greater than or equal to the environmental temperature threshold; If yes, it is determined that the system adopts the non-anti-freezing mode, and step S2 is entered; If no, it is determined that the system adopts the anti-freezing and heat preservation mode, and step S3 is entered; S15. The control module determines whether the pipeline water flow being 0 lasts for a set time period; If yes, it is determined that the system adopts the anti-freezing and emptying mode, and step S4 is entered; If no, step S14 is returned.

3. The data center water supply freeze protection system control method of claim 2, wherein, The specific steps of step S2 are as follows: S21. The control module controls the first electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the sixth electromagnetic valve, and each water using control valve to be opened; S22. The control module controls the second electromagnetic valve, the fifth electromagnetic valve, the seventh electromagnetic valve, and each branch control valve to be closed; S23. The control module controls the circulating water pump and the one-way valve to be closed; S24. The control module controls the heat tracing band to be closed.

4. The data center water supply freeze protection system control method of claim 3, wherein, The specific steps of step S3 are as follows: S31. The control module controls the first electromagnetic valve, the seventh electromagnetic valve, each branch control valve, and each water using control valve to be opened; S32. The control module controls the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, and the sixth electromagnetic valve to be closed; S33. The control module opens the circulating water pump and the one-way valve; S34. The control module acquires the pipeline water temperature collected by the temperature probe of the heat tracing band; S35. The control module determines whether the pipeline water temperature is still less than the environmental temperature threshold after the circulating water pump is opened; If yes, step S36 is entered; If no, the heat tracing band is not opened, and step S13 is returned; S36. The control module opens the heat tracing band, monitors the pipeline water temperature, and when the pipeline water temperature exceeds the upper limit of the alarm, temperature alarm is performed, and the process returns to step S13.

5. The data center water supply freeze protection system control method of claim 4, wherein, The specific steps of step S4 are as follows: S41. The control module controls the first electromagnetic valve to close; S42. The control module controls the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth battery valve, the seventh electromagnetic valve, each water use control valve, and each branch control valve to open; S43. The control module controls the circulating water pump to close; S44. The control module controls the heat tracing band to close; S45. The control module determines whether the drainage time reaches the drainage time threshold value; If yes, the process proceeds to step S46; If no, the process returns to step S45; S46. The control module controls the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth battery valve, the seventh electromagnetic valve, each water use control valve, and each branch control valve to close; S47. The control module controls the system to enter the water supply standby mode, waits for a manual exit instruction, and after receiving the manual exit instruction, the process returns to step S13.

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